{
  "schema_version": "1.4.0",
  "id": "GHSA-cpwx-vrp4-4pq7",
  "modified": "2025-05-01T03:31:17Z",
  "published": "2025-03-05T20:40:14Z",
  "aliases": [
    "CVE-2025-27516"
  ],
  "summary": "Jinja2 vulnerable to sandbox breakout through attr filter selecting format method",
  "details": "An oversight in how the Jinja sandboxed environment interacts with the `|attr` filter allows an attacker that controls the content of a template to execute arbitrary Python code.\n\nTo exploit the vulnerability, an attacker needs to control the content of a template. Whether that is the case depends on the type of application using Jinja. This vulnerability impacts users of applications which execute untrusted templates.\n\nJinja's sandbox does catch calls to `str.format` and ensures they don't escape the sandbox. However, it's possible to use the `|attr` filter to get a reference to a string's plain format method, bypassing the sandbox. After the fix, the `|attr` filter no longer bypasses the environment's attribute lookup.",
  "severity": [
    {
      "type": "CVSS_V4",
      "score": "CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
    }
  ],
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "Jinja2"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.1.6"
            }
          ]
        }
      ],
      "database_specific": {
        "last_known_affected_version_range": "<= 3.1.5"
      }
    }
  ],
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/pallets/jinja/security/advisories/GHSA-cpwx-vrp4-4pq7"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-27516"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pallets/jinja/commit/90457bbf33b8662926ae65cdde4c4c32e756e403"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/pallets/jinja"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/04/msg00045.html"
    }
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1336"
    ],
    "severity": "MODERATE",
    "github_reviewed": true,
    "github_reviewed_at": "2025-03-05T20:40:14Z",
    "nvd_published_at": "2025-03-05T21:15:20Z"
  }
}